Download Microsoft Dynamics CRM 4.0
Via blogs.msdn.com/crm:
Download the Microsoft Dynamics CRM 4.0 Trial Versions in either 32 or 64-bit!
Download the Microsoft Dynamics CRM for Outlook (For On-Premise and Hosted Editions) 32 bit!
Download the Microsoft Dynamics CRM 4.0 Data Migration Manager 32 bit!
Download the Microsoft Dynamics CRM 4.0 E-mail Router (On-Premise and Hosted Editions) in either 32 or 64-bit!
Implementation Guid:
https://www.microsoft.com/downloads/details.aspx?FamilyId=1CEB5E01-DE9F-48C0-8CE2-51633EBF4714&displaylang=en